[英]viewForAnnotation not being fired
我在 map 上顯示一個引腳,但我無法自定義注釋視圖的顯示。 出於某種原因,我的 viewForAnnotation 沒有被調用。 這是 didFinishLaunchingWithOptions 方法。
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[mapView setDelegate:self];
locationManager = [[CLLocationManager alloc] init];
[locationManager setDelegate:self];
[locationManager setDistanceFilter:kCLDistanceFilterNone];
[locationManager setDesiredAccuracy:kCLLocationAccuracyBest];
[mapView setShowsUserLocation:YES];
// Override point for customization after application launch.
[self.window makeKeyAndVisible];
return YES;
}
這是我從未調用過的 viewForAnnotation 方法。
- (MKAnnotationView *)mv:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
NSLog(@"viewForAnnotation");
if([annotation isKindOfClass:[MKUserLocation class]])
return nil;
static NSString *annotationIdentifier = @"AnnotationIdentifier";
MKPinAnnotationView *pinView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:annotationIdentifier];
[pinView setPinColor:MKPinAnnotationColorGreen];
pinView.animatesDrop = YES;
pinView.canShowCallout = YES;
UIImageView *houseIconView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"house.png"]];
pinView.leftCalloutAccessoryView = houseIconView;
[houseIconView release];
return pinView;
}
這是 didUpdateUserLocation 方法:
- (void)mapView:(MKMapView *)mv didUpdateUserLocation:(MKUserLocation *)userLocation
{
NSTimeInterval t = [[[userLocation location] timestamp] timeIntervalSinceNow];
if(t < -180) return;
NSLog(@"%@",[textField text]);
MapPoint *mp = [[MapPoint alloc] initWithCoordinate:userLocation.location.coordinate title:[textField text]];
[mv addAnnotation:mp];
[mp release];
}
viewForAnnotation
委托方法必須命名為mapView:viewForAnnotation:
。
您的方法名為mv:viewForAnnotation:
。
編輯:
這是一個示例,其中包含我的評論中建議的其他兩個更改:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
NSLog(@"viewForAnnotation");
if([annotation isKindOfClass:[MKUserLocation class]])
return nil;
static NSString *annotationIdentifier = @"AnnotationIdentifier";
MKPinAnnotationView *pinView = (MKPinAnnotationView *) [mapView
dequeueReusableAnnotationViewWithIdentifier:annotationIdentifier];
if (!pinView)
{
pinView = [[[MKPinAnnotationView alloc]
initWithAnnotation:annotation
reuseIdentifier:annotationIdentifier] autorelease];
[pinView setPinColor:MKPinAnnotationColorGreen];
pinView.animatesDrop = YES;
pinView.canShowCallout = YES;
UIImageView *houseIconView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"house.png"]];
pinView.leftCalloutAccessoryView = houseIconView;
[houseIconView release];
}
else
{
pinView.annotation = annotation;
}
return pinView;
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.